| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.mrunit; |
| |
| import static org.apache.hadoop.mrunit.ExtendedAssert.assertListEquals; |
| import static org.junit.Assert.*; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.IntWritable; |
| import org.apache.hadoop.io.LongWritable; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.mapred.FileSplit; |
| import org.apache.hadoop.mapred.JobConf; |
| import org.apache.hadoop.mapred.MapReduceBase; |
| import org.apache.hadoop.mapred.Mapper; |
| import org.apache.hadoop.mapred.OutputCollector; |
| import org.apache.hadoop.mapred.Reporter; |
| import org.apache.hadoop.mapred.SequenceFileInputFormat; |
| import org.apache.hadoop.mapred.SequenceFileOutputFormat; |
| import org.apache.hadoop.mapred.TextInputFormat; |
| import org.apache.hadoop.mapred.TextOutputFormat; |
| import org.apache.hadoop.mapred.lib.IdentityMapper; |
| import org.apache.hadoop.mrunit.types.Pair; |
| import org.junit.Before; |
| import org.junit.Rule; |
| import org.junit.Test; |
| |
| @SuppressWarnings("deprecation") |
| public class TestMapDriver { |
| |
| @Rule |
| public final ExpectedSuppliedException thrown = ExpectedSuppliedException |
| .none(); |
| private Mapper<Text, Text, Text, Text> mapper; |
| private MapDriver<Text, Text, Text, Text> driver; |
| |
| @Before |
| public void setUp() { |
| mapper = new IdentityMapper<Text, Text>(); |
| driver = MapDriver.newMapDriver(mapper); |
| } |
| |
| @Test |
| public void testRun() throws IOException { |
| final List<Pair<Text, Text>> out = driver.withInput(new Text("foo"), |
| new Text("bar")).run(); |
| |
| final List<Pair<Text, Text>> expected = new ArrayList<Pair<Text, Text>>(); |
| expected.add(new Pair<Text, Text>(new Text("foo"), new Text("bar"))); |
| |
| assertListEquals(out, expected); |
| } |
| |
| @Test |
| public void testTestRun1() throws IOException { |
| driver.withInput(new Text("foo"), new Text("bar")) |
| .withOutput(new Text("foo"), new Text("bar")).runTest(); |
| } |
| |
| @Test |
| public void testTestRun2() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("2 Error(s): (Expected no outputs; got 1 outputs., " |
| + "Received unexpected output (foo, bar) at position 0.)"); |
| driver.withInput(new Text("foo"), new Text("bar")).runTest(); |
| } |
| |
| @Test |
| public void testTestRun3() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("1 Error(s): (Missing expected output (foo, bar) at position 1.)"); |
| driver.withInput(new Text("foo"), new Text("bar")) |
| .withOutput(new Text("foo"), new Text("bar")) |
| .withOutput(new Text("foo"), new Text("bar")).runTest(true); |
| } |
| |
| @Test |
| public void testTestRun3OrderInsensitive() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("1 Error(s): (Missing expected output (foo, bar))"); |
| driver.withInput(new Text("foo"), new Text("bar")) |
| .withOutput(new Text("foo"), new Text("bar")) |
| .withOutput(new Text("foo"), new Text("bar")).runTest(false); |
| } |
| |
| @Test |
| public void testTestRun4() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("1 Error(s): (Missing expected output (bonusfoo, bar) at position 1.)"); |
| driver.withInput(new Text("foo"), new Text("bar")) |
| .withOutput(new Text("foo"), new Text("bar")) |
| .withOutput(new Text("bonusfoo"), new Text("bar")).runTest(true); |
| } |
| |
| @Test |
| public void testTestRun4OrderInsensitive() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("1 Error(s): (Missing expected output (bonusfoo, bar))"); |
| driver.withInput(new Text("foo"), new Text("bar")) |
| .withOutput(new Text("foo"), new Text("bar")) |
| .withOutput(new Text("bonusfoo"), new Text("bar")).runTest(false); |
| } |
| |
| @Test |
| public void testTestRun5() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("2 Error(s): (Missing expected output (foo, somethingelse) at position 0., " |
| + "Received unexpected output (foo, bar) at position 0.)"); |
| driver.withInput(new Text("foo"), new Text("bar")) |
| .withOutput(new Text("foo"), new Text("somethingelse")).runTest(true); |
| } |
| |
| @Test |
| public void testTestRun5OrderInsensitive() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("2 Error(s): (Missing expected output (foo, somethingelse), " |
| + "Received unexpected output (foo, bar))"); |
| driver.withInput(new Text("foo"), new Text("bar")) |
| .withOutput(new Text("foo"), new Text("somethingelse")).runTest(false); |
| } |
| |
| @Test |
| public void testTestRun6() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("2 Error(s): (Missing expected output (someotherkey, bar) at position 0., " |
| + "Received unexpected output (foo, bar) at position 0.)"); |
| driver.withInput(new Text("foo"), new Text("bar")) |
| .withOutput(new Text("someotherkey"), new Text("bar")).runTest(true); |
| } |
| |
| @Test |
| public void testTestRun6OrderInsensitive() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("2 Error(s): (Missing expected output (someotherkey, bar), " |
| + "Received unexpected output (foo, bar)"); |
| driver.withInput(new Text("foo"), new Text("bar")) |
| .withOutput(new Text("someotherkey"), new Text("bar")).runTest(false); |
| } |
| |
| @Test |
| public void testTestRun7() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("2 Error(s): (Matched expected output (foo, bar) but at " |
| + "incorrect position 0 (expected position 1), " |
| + "Missing expected output (someotherkey, bar) at position 0.)"); |
| driver.withInput(new Text("foo"), new Text("bar")) |
| .withOutput(new Text("someotherkey"), new Text("bar")) |
| .withOutput(new Text("foo"), new Text("bar")).runTest(true); |
| } |
| |
| @Test |
| public void testTestRun7OrderInsensitive() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("1 Error(s): (Missing expected output (someotherkey, bar))"); |
| driver.withInput(new Text("foo"), new Text("bar")) |
| .withOutput(new Text("someotherkey"), new Text("bar")) |
| .withOutput(new Text("foo"), new Text("bar")).runTest(false); |
| } |
| |
| @Test |
| public void testTestRun8OrderInsensitive() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("3 Error(s): (Missing expected output (foo, bar), " |
| + "Missing expected output (foo, bar), " |
| + "Missing expected output (foo, bar))"); |
| driver.withInput(new Text("foo"), new Text("bar")) |
| .withOutput(new Text("foo"), new Text("bar")) |
| .withOutput(new Text("foo"), new Text("bar")) |
| .withOutput(new Text("foo"), new Text("bar")) |
| .withOutput(new Text("foo"), new Text("bar")).runTest(false); |
| } |
| |
| @Test |
| public void testUnexpectedOutput() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("1 Error(s): (Received unexpected output (foo, bar) at position 1.)"); |
| driver.withMapper(new DuplicatingMapper()).withInput(new Text("foo"),new Text("bar")) |
| .withOutput(new Text("foo"),new Text("bar")) |
| .runTest(true); |
| } |
| |
| @Test |
| public void testUnexpectedOutputMultiple() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("3 Error(s): (Received unexpected output (foo, bar) at position 1., " |
| + "Received unexpected output (foo, bar) at position 2., " |
| + "Received unexpected output (foo, bar) at position 3.)"); |
| driver.withMapper(new DuplicatingMapper(4)).withInput(new Text("foo"),new Text("bar")) |
| .withOutput(new Text("foo"),new Text("bar")) |
| .runTest(true); |
| } |
| |
| @Test |
| public void testUnexpectedOutputOrderInsensitive() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("1 Error(s): (Received unexpected output (foo, bar))"); |
| driver.withMapper(new DuplicatingMapper()).withInput(new Text("foo"),new Text("bar")) |
| .withOutput(new Text("foo"),new Text("bar")) |
| .runTest(false); |
| } |
| |
| @Test |
| public void testUnexpectedOutputMultipleOrderInsensitive() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("3 Error(s): (Received unexpected output (foo, bar), " |
| + "Received unexpected output (foo, bar), " |
| + "Received unexpected output (foo, bar))"); |
| driver.withMapper(new DuplicatingMapper(4)).withInput(new Text("foo"),new Text("bar")) |
| .withOutput(new Text("foo"),new Text("bar")) |
| .runTest(false); |
| } |
| |
| @Test |
| public void testSetInput() { |
| driver.setInput(new Pair<Text, Text>(new Text("foo"), new Text("bar"))); |
| |
| assertEquals(driver.getInputKey(), new Text("foo")); |
| assertEquals(driver.getInputValue(), new Text("bar")); |
| } |
| |
| @Test |
| public void testSetInputNull() { |
| thrown.expect(NullPointerException.class); |
| driver.setInput((Pair<Text, Text>) null); |
| } |
| |
| @Test |
| public void testNoInput() throws IOException { |
| driver = MapDriver.newMapDriver(); |
| thrown.expectMessage(IllegalStateException.class, "No input was provided"); |
| driver.runTest(); |
| } |
| |
| @Test |
| public void testNoMapper() throws IOException { |
| driver = MapDriver.newMapDriver(); |
| thrown.expectMessage(IllegalStateException.class, |
| "No Mapper class was provided"); |
| driver.withInput(new Text("foo"), new Text("bar")).runTest(); |
| } |
| |
| private static class NonTextWritableInput extends MapReduceBase implements |
| Mapper<LongWritable, LongWritable, Text, Text> { |
| |
| @Override |
| public void map(final LongWritable key, final LongWritable value, |
| final OutputCollector<Text, Text> output, final Reporter reporter) |
| throws IOException { |
| output.collect(new Text("a"), new Text("b")); |
| } |
| |
| } |
| |
| @Test |
| public void testWithCounter() throws IOException { |
| MapDriver<Text, Text, Text, Text> driver = MapDriver.newMapDriver(); |
| |
| driver.withMapper(new MapperWithCounters<Text, Text, Text, Text>()) |
| .withInput(new Text("hie"), new Text("Hi")) |
| .withOutput(new Text("hie"), new Text("Hi")) |
| .withCounter(MapperWithCounters.Counters.X, 1) |
| .withCounter("category", "name", 1).runTest(); |
| } |
| |
| @Test |
| public void testWithFailedCounter() throws IOException { |
| MapDriver<Text, Text, Text, Text> driver = MapDriver.newMapDriver(); |
| |
| thrown.expectAssertionErrorMessage("2 Error(s): (" + |
| "Counter org.apache.hadoop.mrunit.TestMapDriver.MapperWithCounters.Counters.X have value 1 instead of expected 4, " + |
| "Counter with category category and name name have value 1 instead of expected 4)"); |
| |
| driver.withMapper(new MapperWithCounters<Text, Text, Text, Text>()) |
| .withInput(new Text("hie"), new Text("Hi")) |
| .withOutput(new Text("hie"), new Text("Hi")) |
| .withCounter(MapperWithCounters.Counters.X, 4) |
| .withCounter("category", "name", 4).runTest(); |
| } |
| |
| /** |
| * Simple mapper that have custom counter that is increased each map() call |
| */ |
| public static class MapperWithCounters<KI, VI, KO, VO> implements Mapper<KI, VI, KO, VO> { |
| @Override |
| public void map(KI ki, VI vi, OutputCollector<KO, VO> outputCollector, Reporter reporter) throws IOException { |
| outputCollector.collect((KO) ki, (VO) vi); |
| reporter.getCounter(Counters.X).increment(1); |
| reporter.getCounter("category", "name").increment(1); |
| } |
| |
| public static enum Counters { |
| X |
| } |
| |
| @Override |
| public void close() throws IOException { |
| } |
| |
| @Override |
| public void configure(JobConf entries) { |
| } |
| } |
| |
| @Test |
| public void testNonTextWritableWithInputFromString() throws IOException { |
| final MapDriver<LongWritable, LongWritable, Text, Text> driver = MapDriver |
| .newMapDriver(new NonTextWritableInput()); |
| driver.withInputFromString("a\tb"); |
| thrown |
| .expectMessage(ClassCastException.class, |
| "org.apache.hadoop.io.Text cannot be cast to org.apache.hadoop.io.LongWritable"); |
| driver.runTest(); |
| } |
| |
| private static class NonTextWritableOutputKey extends MapReduceBase implements |
| Mapper<Text, Text, LongWritable, Text> { |
| |
| @Override |
| public void map(final Text key, final Text value, |
| final OutputCollector<LongWritable, Text> output, |
| final Reporter reporter) throws IOException { |
| output.collect(new LongWritable(1), new Text("a")); |
| } |
| |
| } |
| |
| @Test |
| public void testNonTextWritableKeyWithOutputFromString() throws IOException { |
| final MapDriver<Text, Text, LongWritable, Text> driver = MapDriver |
| .newMapDriver(new NonTextWritableOutputKey()); |
| driver.withInputFromString("a\tb"); |
| driver.withOutputFromString("1\ta"); |
| thrown |
| .expectAssertionErrorMessage("2 Error(s): (Missing expected output (1, a): Mismatch in key class: " |
| + "expected: class org.apache.hadoop.io.Text actual: class org.apache.hadoop.io.LongWritable, " |
| + "Received unexpected output (1, a): " |
| + "Mismatch in key class: expected: class org.apache.hadoop.io.Text actual: class org.apache.hadoop.io.LongWritable)"); |
| driver.runTest(); |
| } |
| |
| private static class NonTextWritableOutputValue extends MapReduceBase |
| implements Mapper<Text, Text, Text, LongWritable> { |
| |
| @Override |
| public void map(final Text key, final Text value, |
| final OutputCollector<Text, LongWritable> output, |
| final Reporter reporter) throws IOException { |
| output.collect(new Text("a"), new LongWritable(1)); |
| } |
| |
| } |
| |
| /** |
| * Similar to IdentityMapper, but outputs each key/value pair twice |
| */ |
| private static class DuplicatingMapper extends MapReduceBase |
| implements Mapper<Text, Text, Text, Text> { |
| private int duplicationFactor = 2; |
| public DuplicatingMapper() { |
| |
| } |
| public DuplicatingMapper(int factor) { |
| duplicationFactor = factor; |
| } |
| @Override |
| public void map(Text key, Text value, OutputCollector<Text, Text> output, |
| Reporter reporter) throws IOException { |
| for (int i = 0; i < duplicationFactor; i++) |
| output.collect(key,value); |
| } |
| } |
| |
| @Test |
| public void testNonTextWritableValueWithOutputFromString() throws IOException { |
| final MapDriver<Text, Text, Text, LongWritable> driver = MapDriver |
| .newMapDriver(new NonTextWritableOutputValue()); |
| driver.withInputFromString("a\tb"); |
| driver.withOutputFromString("a\t1"); |
| thrown |
| .expectAssertionErrorMessage("2 Error(s): (Missing expected output (a, 1): Mismatch in value class: " |
| + "expected: class org.apache.hadoop.io.Text actual: class org.apache.hadoop.io.LongWritable, " |
| + "Received unexpected output (a, 1): Mismatch in value class: expected: class " |
| + "org.apache.hadoop.io.Text actual: class org.apache.hadoop.io.LongWritable)"); |
| driver.runTest(); |
| } |
| |
| @Test |
| public void testJavaSerialization() throws IOException { |
| final Configuration conf = new Configuration(); |
| conf.setStrings("io.serializations", conf.get("io.serializations"), |
| "org.apache.hadoop.io.serializer.JavaSerialization"); |
| final MapDriver<Integer, IntWritable, Integer, IntWritable> driver = MapDriver |
| .newMapDriver(new IdentityMapper<Integer, IntWritable>()) |
| .withConfiguration(conf); |
| driver.setInput(1, new IntWritable(2)); |
| driver.addOutput(1, new IntWritable(2)); |
| driver.runTest(); |
| } |
| |
| @Test |
| public void testCopy() throws IOException { |
| driver = MapDriver.newMapDriver(new DuplicatingMapper()); |
| final Text input = new Text("a"); |
| driver.withInputKey(input); |
| input.set("b"); |
| driver.withInputValue(input); |
| input.set("c"); |
| |
| final Text output = new Text("a"); |
| driver.withOutput(output, new Text("b")); |
| output.set("b"); |
| driver.withOutput(new Text("a"), output); |
| driver.runTest(); |
| } |
| |
| @Test |
| public void testOutputFormat() throws IOException { |
| driver.withOutputFormat(SequenceFileOutputFormat.class, |
| SequenceFileInputFormat.class); |
| driver.withInput(new Text("a"), new Text("1")); |
| driver.withOutput(new Text("a"), new Text("1")); |
| driver.runTest(); |
| } |
| |
| @Test |
| public void testOutputFormatWithMismatchInOutputClasses() throws IOException { |
| @SuppressWarnings({ "rawtypes", "unchecked" }) |
| final MapDriver<Text, Text, LongWritable, Text> driver = MapDriver |
| .newMapDriver(new IdentityMapper()); |
| driver.withOutputFormat(TextOutputFormat.class, TextInputFormat.class); |
| driver.withInput(new Text("a"), new Text("1")); |
| driver.withOutput(new LongWritable(), new Text("a\t1")); |
| driver.runTest(); |
| } |
| |
| private static class InputPathStoringMapper extends MapReduceBase implements |
| Mapper<Text, Text, Text, Text> { |
| private Path mapInputPath; |
| |
| @Override |
| public void map(Text key, Text value, OutputCollector<Text, Text> output, |
| Reporter reporter) throws IOException { |
| if (reporter.getInputSplit() instanceof FileSplit) { |
| mapInputPath = ((FileSplit) reporter.getInputSplit()).getPath(); |
| } |
| } |
| |
| private Path getMapInputPath() { |
| return mapInputPath; |
| } |
| } |
| |
| @Test |
| public void testMapInputFile() throws IOException { |
| InputPathStoringMapper mapper = new InputPathStoringMapper(); |
| Path mapInputPath = new Path("myfile"); |
| driver = MapDriver.newMapDriver(mapper); |
| driver.setMapInputPath(mapInputPath); |
| assertEquals(mapInputPath.getName(), driver.getMapInputPath().getName()); |
| driver.withInput(new Text("a"), new Text("1")); |
| driver.runTest(); |
| assertNotNull(mapper.getMapInputPath()); |
| assertEquals(mapInputPath.getName(), mapper.getMapInputPath().getName()); |
| } |
| } |